code: def test_fit(self, corpus, root):
      w2v = Word2Vec()
      with pytest.raises(KeyError):
          w2v._model.wv[f"{URL}#{root}"]
      w2v.fit(corpus, False)
      assert len(w2v._model.wv[f"{URL}#{root}"]) > 0
  
file_path: pyRDF2Vec/tests/embedders/test_word2vec.py
imports: import itertools
  import numpy
  import pytest
  from pyrdf2vec.embedders import Word2Vec
label_desc: Use image node_id 2 for calling the TestWord2Vec obj's underlying member method code with example usage: obj.test_fit(corpus, root) without return types